Elena Katselli Proukaki is a Lecturer at Newcastle University, UK.

'Katselli Proukaki's core conclusion that countermeasures as solidarity measures are permitted by international law is well-founded, is supported by her research in State practice, and should be embraced.''Katselli Proukaki deserves credit for vigorously challenging the ILC approach with good arguments. Her scholarly work contributes greatly to the debate on solidarity measures as one of the still open issues of the law of State responsibility' Achilles Skordas, Solicitor, England and Wales; Visiting Professor, University of Sydney; Visiting Fellow, British Institute of International and Comparative Law

• 1. The International Community, Jus Cogens Norms and Obligations Erga Omnes 2. Community Interests in the Law on State Responsibility 3. Countermeasures in the Name of Community Interests in State Practice 4. Self-Contained Regimes, Solidarity Measures and the Fragmentation of International Law 5. The Principle of Proportionality

Elena Katselli Proukaki is a Lecturer at Newcastle University, UK.

'Katselli Proukaki's core conclusion that countermeasures as solidarity measures are permitted by international law is well-founded, is supported by her research in State practice, and should be embraced.''Katselli Proukaki deserves credit for vigorously challenging the ILC approach with good arguments. Her scholarly work contributes greatly to the debate on solidarity measures as one of the still open issues of the law of State responsibility' Achilles Skordas, Solicitor, England and Wales; Visiting Professor, University of Sydney; Visiting Fellow, British Institute of International and Comparative Law

• 1. The International Community, Jus Cogens Norms and Obligations Erga Omnes 2. Community Interests in the Law on State Responsibility 3. Countermeasures in the Name of Community Interests in State Practice 4. Self-Contained Regimes, Solidarity Measures and the Fragmentation of International Law 5. The Principle of Proportionality

Elena Katselli Proukaki is a Lecturer at Newcastle University, UK.

'Katselli Proukaki's core conclusion that countermeasures as solidarity measures are permitted by international law is well-founded, is supported by her research in State practice, and should be embraced.''Katselli Proukaki deserves credit for vigorously challenging the ILC approach with good arguments. Her scholarly work contributes greatly to the debate on solidarity measures as one of the still open issues of the law of State responsibility' Achilles Skordas, Solicitor, England and Wales; Visiting Professor, University of Sydney; Visiting Fellow, British Institute of International and Comparative Law

• 1. The International Community, Jus Cogens Norms and Obligations Erga Omnes 2. Community Interests in the Law on State Responsibility 3. Countermeasures in the Name of Community Interests in State Practice 4. Self-Contained Regimes, Solidarity Measures and the Fragmentation of International Law 5. The Principle of Proportionality